Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
;~C~0S~71.
BACKGROUND OF THE INVENTION
1. Field of th~ Invention:
The present invention relates to a buckle for releas-
ably connecting loose ends of a belt or strap applled to
garments, bags, canteens, or the like, and more particularly
to a low-profile buckle having a flat structure.
2. Description of the Prior Art:
~ uckles molded of synthetic resin are wldely used in
recent years because they can be manufactured at a low cost.
The molded synthetic resin buckles are however made rela-
tively thick and bulky so as to withstand forces applied
thereto during the use of an article to which the buckle is
attached.
The recent trend of the buckles is towards a thinner
or low-profile design. One such low-profile buckle is dis-
closed in Japanese Utility Model Laid-open Publication No.
60-126010. The disclosed buckle is made of metal and com-
prises of a male member including a pair of locking legs
having locking steps at their distal ends, and a female
member composed of a base member having a belt retaining
portion, front and back plates covering the opposite sides
of the base member, and a resilient member having a resll-
ient locking piece releasably engageable with the locking
step of the male member. The back plate has a pr~sser piece
adapted to be depressed by the user's finger to unlock the
locking legs of the male member and the resilient member of
the female member.
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Since the female member 18 composed of four component
parts assembled toget~er, l.e. the base, the front plate,
the back plate and ~he resllient member, the prior low-
profile buckle requires a complicated and tlme-consumlng
assembling process and hence 18 costly to manufacture.
SUMMARY OF THE INVENTION
With the foregoing dlfflculties in view, lt 18 an
ob~ect of the present invention to provide a buckle whlch i8
low ln profile and does not deterlorate the aesthetlGal
appearance of an article to which the buckle 18 attached,
has a sufficient strength comparable to the metal buckles,
and is capable of dispensing the need for a complicated
assembling process of a female member and hence can be
manufactured at a low cost.
In brief, a buckle according to the present lnventlon
includes a $1at one-piece female or socket member molded of
synthetio resin and lncludlng a top plate havlng a reslllent
locking wing engageable wlth locklng feet of a palr of.legs
of a male or plug member to lnterlock the socket and plug
members, and a back plate havlng a resilient presser flap
adapted to be manually depressed to urge the reslllent
locklng wing out of engagement wlth the lock~ng feet to
disengage the socket and plug members.
More particularly, accordlng to the present inven-
tion, there ls provided a buckle comprlslng: a planar plug
member including a palr oP laterally spaced Plat legs having
a pair of locking feet proJectlng from one surface of the
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respectlve flat legs; and a flat one-piece socket member
molded of synthetic resln and includlng a top plate and a
back plate definlng therebetween a guide channel for recelv-
ing therein the flat legs of the plug member, the top plate
including a resilient locking wing pro~ecting into the guide
channel and engageable with the locking feet to interlock
the plug member and the socket member, the back plate in-
cluding a resilient presser flap resiliently flexlble toward
the resilient locklng wing to urge the latter to move out-
wardly of the guide channel for brlnging the locking wing
and the locking feet out of engagement with one another.
With this construction, when the plug and socket
members of the buckle are to be coupled, the legs of the
plug member are lnserted into the guide channel of the
socket member. As the legs are forced to advance, the
locklng feet of the respective legs engage the resilient
locking wing of the socket member and then cause the resil-
lent locking wing to flex outwardly of the guide channel. A
further advancing movement of the legs causes the locking
feet to move past the resilient locking wing whereupon the
resillent locking wing is enabled to spring back into its
lnitial position to lock the locking feet, thereby coupllng
the socket and plug members of the buckle. To disengage the
socket and plug members, the resilient presser flap is
depressed by the user's finger to cause the resilient lock-
lng wing to resiliently flex outwardly of the guide channel
so that the locking feet are released from interlocking
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engagement wlth the locking wlng. The plug member 18 thus
allowed to be released from the socket member.
The above and other ob~ects, features and advantages
of the present inventlon will become manlfsst to those
versed in the art upon maklng reference to the detalled
descrlption and the accompanylng sheets of drawings ln whloh
a preferred structural embodlment lncorporatlng the princl-
ples of the present invention is shown by way of illustra-
tive example.
~RIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 ls a front elevatlonal vlew of a buckle ac-
cordlng to the present lnventlon;
FIG. 2 is n right slde view of FIG. 1:
FIG. 3 ls a rear vlew of FIG. l;
FIG. 4 ls a cross-sectional view taken along llne IV
- IV of FIG. 2;
FIG. 5 is a cross-sectional vlew taken along line V -
V of FIG. l;
. .
FIG. 6 18 a front elevatlonal vlew of a male or plug
member whlch constltutes one part of the buckle shown ln
FIG. l;
FIG. 7 i8 a cross-sectlonal vlew taken along llne VII
- VII of FIG. 6;
FIG. 8 ls a front elevational view of a female or
socket member whlch constitutes the other part of the buckle
shown in FIG. l;
FIG. 9 ls a right side vlew of FIG. 8;
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FIG. 10 ls a rear vlew of FIG. ~:
FIG. 11 ls an end elevatlonal view of FIG. 10:
FIG. 12 is a cross-sectional view taken along line
XII - XII of FIG. 8: and
FIG. 13 i8 a cross-sectional vlew taken along llne
XIII - XIII of FIG. 9.
DETAILED DESCRIPTION
Referrlng to the drawings, wherein like reference
characters designate like or corresponding parts throughout
the several views, FIG. 1 shows a buckle 10 embodylng the
present lnventlon. The buckle 10 compriseQ a male or plug
member 11 and a female or socket member 12 releasably cou-
pled wlth the plug member 11.
The plug member 11, as shown ln FIGS. 6 and 7, ln-
cludes a palr of laterally spaced flat legs 13, 13 extending
from one end of a flat hollow connector frame 15 of a rec-
tangular shape and having a pair of locking feet 14, 14,
respectlvely, proJectlng from one surface of the respective
legs 13. The hollow connector frame 15 18 adapted to be
connected to an end portlon of a strap or belt ~ (FIG. 5)
and lncludes a central crossbar 16 around whlch the belt end
portlon 18 looped. The connector frame 15 further has a
palr of transverse guide grooves 17 extending along opposite
side edges of the cro8sbar 16 for the passage of the belt
end portion. A pair of gulde proJectlons 18, 18 is disposed
on one surface of the connector frame 15 adJacent to respec-
tlve proxlmal ends of the legs 13 for a purpose descrlbed
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later. The gulde pro~ections 18 are dlsposed on a same side
of the plug member 11 as the locking feet 14. The legs 13
have respectlve ankles 19 of a reduced thickness adJacent to
the locking feet 14. With the thin ankles 19 thus provlded,
the locking feet 14 have a thickness same as the maximum
thickness of the legs 13, as shown in FIG. 6. The locklng
feet 14 have a pair of abutment surfaces 14a, respectively,
faclng toward the proxlmal ends of the respective legs 13.
The plug member 11 ln the lllustrated embodlment 18 made of
metal, however, lt may be formed of synthetlc re~ln provided
that the molded synthetic resin plug member is strong enough
to withstand forces applled thereto during the use of an
article to whlch the buckle is attached.
The socket member 12 18 ln~ectlon-molded of synthetlc
resln and includes, as shown ln FIG. 8, a transverQe groove
20 deflned by and between a body of the socket member 12 and
a transverse connector bar 21. Another end portlon of the
belt B (FIG. 5) ls attached to the connector bar 21 wlth a
loop extending around the Connector bar 21. As shown ln
FIGS. 11 and 12, the body of the socket member 12 is ln the
shape of a flat box havlng a top plate 23 and a back plate
23 deflnlng therebetween a gulde channel 22 for recelvlng
thereln the legs 13 of the plug member 11. The gulde chan-
nel 22 has an open end 22a (FIG. 12) through whlch the legs
13 are moved lnto and out of the gulde channel 22. The top
plate 23 has a thlckness sllghtly larger than the thlckness
of the back plate 24.
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The top plate 23, as shown ln FIG. 8, has a U-shaped
outer 810t 25 and a U-shaped lnner 810t 26 extendlng paral-
lel to one another 90 as to form a U-shaped reslllent lock-
ing wlng 27 therebetween. The top plate 23 further has ln
lts outslde surface a pair of allgned transverse recesses 28
each extending between adJacent ends of the U-shaped lnner
and outer slots 25, 26 to enhance the resiliency of the U-
shaped re~ilient locking wing 27. The U-shaped resilient
looking wlng 27 is lntegrally Joined at lts opposite ends
wlth the top plate 23 and extend~ longitudinally of the
gulde channel 22 wlth the opposite ends directed toward the
open end 22a of the guide channel 22. The distal end of the
U-shaped resilient locking wing 27 is bent or stepped in-
wardly so as to proJect into the guide channel 22 for en-
gagement wlth the locklng feet 14 of the plug member 11.
The U-shaped resilient locklng wlng 27 has a transverse
retalnlng surface 29 extendlng along the dlstal end thereof
and lockingly engageable wlth the respective abutment sur-
faces 14a of the locking feet 14 to lnterlock the plug and
socket members 11, 12. The top plate 23 further has ln its
inside surface a pair of gulde recesses 30 (FIGS. 8 and 13)
extendlng from an open end of the socket member 12 longltu-
dinally of the gulde channel i2 for ~nugly recelving thereln
the mating gulde proJectlons 18 on the plug member 11. With
thls comblnatlon of the guide pro~ections 18 and the gulde
recesses 30, the plug member 11 and the socket member 12 can
be coupled together easlly and reliably wlthout cau~ing
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mlsmatchlng of the front and back sldes of the plug and
socket members 11, 12.
The back plate 24, as shown ln FIG. 10, has a gener-
ally inv~rted U-shaped slot 31 extendlng wlt~ lts opposite
ends directed away from the open end 22a (FIG. 5) of the
gulde channel 22 so as to form a substantially rectangular
resilient presser flap 32 lntegrally Joined at it~ proximal
end with the back plate 24. The opposlte ends of the U-
shaped slot 31 are connected together by a transverse recess
33 extending in the outside surface of the back plate 24 for
providing an enhanced resiliency to the resllient presser
flap 32. ~he resilient pres~er flap 3~ is dlsposed substan-
tlally centrally of the width of the back plate 24 and has a
width smaller than the dlstance between the flat legs 13 of
the plug member 11, as shown in FIG. 4 so that the presser
flap 32 ls engageable with the reslllent locklng wlng 27
without interference wlth the flat legs 13 of the plug
member 11 for a purpose descrlbed later. A8 shown ln FIG.
5, the reslllent presser flap 32 normally lies in a same
plane as the back plate 24 and has at its dlstal end an
enlarged presser head 3-4 confrontlng the dlstal end of the
resllient locklng wlng 27 and proJectlng lnto the guide
channel 22. The presser head 34 18 normally separated a
space from the resllient locklng wlng 27 and when the resil-
lent presser flap 32 18 depressed by the user's finger lnto
the gulde channel 22, the presser head 34 ls brought lnto
engagement with the re8111ent locklng wlng 27 and then urge8
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the locklng wing 27 to reslllently flex outwardly of the
gulde channel 22 for bringlng the reslllent locking wlng 27
and the locklng feet 14 out of locklng engagement wlth one
another.
The flat box-shaped socket member 12 molded of syn-
thetic resln is considerably thlnner than the conventional
molded socket members. The socket member 12 has a palr of
parallel spaced reinforcement walls 35 integral with the top
and back plates 23, 24 and extendlng longitudlnally of the
gulde channel 22. The reinforcement walls 35 are disposed
inwardly of U-shaped inner slot 26 and extend from the slot
26 toward the open end 22a of the guids channel 22 and
tarmlnate short of the open end 22a as shown ln FIG. 13 80
as not to lnterfere wlth the connector frame 15 of the plug
member 11 when the plug member 11 ls coupled to the socket
member 12, as illustrated ln FIG. 4. The socket member 12
further has a relnforcement rlb 36 integral wlth the top
plate 23 and extendlng parallel to the reinforcsment walls
35, as shown ln FIG. 13. The relnforcement rlb 36 18 dis-
posed at a closed end of the guide channel 22 and located
centrally of the wldth of the top plate 23.
To couple the plug and socket members 11, 12 of the
buckle 10 as shown in FIGS. 1 through 5, the flat legs 13 of
the plug member 11 are lnserted lnto the guide channel 22
(FIG. 5) of the socket member 12 with the locking feet 14
faclng to the front slde of the buckle 10. In thi~ in-
8tance, the locklng feet 14 are brought lnto frlctlonal
~005171
engagement wlth the under surface of the U-shaped reslllent
locklng wlng 27, whereupon the locking wlng 27 ls urged to
reslliently flex outwardly of the guide channel 22. Further
advanclng of the flat legs 13 causes the locklng feet 14 to
move past the retalnlng surface 29 of the locklng wlng 27,
thus ensbllng the locking wlng 27 to sprlng back to lts
orlginal po#ltlon. In this posltlon, the abutment surfaces
14a of the respectlve locklng feet 14 are brought lnto
engagement wlth the retalnlng surface 29 of the locklng wlng
27, thereby locklng the plug and socket members 11, 12 ln
coupled condltlon. The advanclng movement of the flat legs
14 can be achleved smoothly and accurately as the gulde
proJectlons 18 (FIG. 6) of the plug member 11 are snugly
recelved ln the matlng gulde recesses (FIG. 13) of the
socket member 12.
To dlsengage the plug and socket members 11, 12, the
reslllent presser flap 32 ls pushed by the user' 8 flnger
lnto the gulde channel 22, whereupon the enlarged presser
head 34 of the presser flap 32 urges the reslllent locklng
wlng 27 to reslllently flex outwardly of the gulde channel
22 agalnst the reslllency of the locklng wlng 27. Further
presslng on the presser flap 32 causes the retalnlng surface
29 of the locklng wlng 27 to dlsengage from the abutment
surfaces 14a of the locklng feet 14, thus allowlng the plug
member 11 to be detached from the socket member 12.
The buckle 10 of the foregolng constructlon ha8 many
advantage~: Wlth the planar plug member 11 and the flat
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Z0051~
box-shaped socket member 12, the buckle 10 19 considerably
thlnner th~n ~he co~ventlonal molded buck~Qs but has a
strength comparable to the relatlvely thick conventlonal
molded buckles. Such a low-proflle buckle matches so well
with the recent fashion and does not deterlorate the aes-
thetical appearance of an artlcle to which the buckle 18
attached. Slnce the socket member molded of synthetlc resln
has a one-piece structure and hence ls capable of obvlatlng
the need for a complicated assembllng work a~ ln the conven-
tional socket member made of metal. The molded one-plece
socket member 18 simple ln constructlon and can be manufac-
tured at a low cost.
Obvlously, varlous mlnor changes and modlflcatlons of
the present invention are posslble ln the llght of the above
teachlng. It 18 therefore to be understood that wlthln the
~cope of the appended clalms the lnventlon may be practlced
otherwlse than as speclflcally descrlbed.
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